Rigiditas
[医] 强直, 僵硬
🗣️ 情景例句
Stopping by Woods on a Snowy Evening.
雪夜林边小驻足。
To pick your teeth
剔牙
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他们知道了钻透那坚硬的岩石有多么困难，他们会丧失信心的。